Dental X-ray unit



FIG. 1 is a right side perspective view of a dental X-ray unit showing our new design;

FIG. 2 is a right side perspective view thereof, with the arm shown extended and the tube arm pivoted;

FIG. 3 is a left side perspective view thereof, with the tube arm pivoted and the tube head rotated downward;

FIG. 4 is a front and right side perspective view thereof, with the tube arm pivoted and the tube head rotated upward;

FIG. 5 is an enlarged fragmentary rear perspective view of the tube head element thereof, with the arm elements omitted for clarity of illustration;

FIG. 6 is an enlarged fragmentary front perspective view of the tube head element thereof, with the tube head rotated downward and the arm elements omitted for clarity of illustration; and

FIG. 7 is an enlarged fragmentary side perspective view of the tube head element thereof, with the tube head rotated downward and the arm elements omitted for clarity of illustration. 

The ornamental design for a dental X-ray unit, substantially as shown and described. 